China's 36th Antarctic expedition team work on icebreaker Xuelong 2(1/7)

Members of China's 36th Antarctic expedition team lay a box corer on China's polar icebreaker Xuelong 2 in the Cosmonauts Sea, Jan. 7, 2020. (Xinhua/Liu Shiping)

A member of China's 36th Antarctic expedition team shows the benthos sample collected from the Cosmonauts Sea on China's polar icebreaker Xuelong 2, Jan. 8, 2020. (Xinhua/Liu Shiping)

Aerial photo taken on Jan. 7, 2020 shows members of China's 36th Antarctic expedition team retrieving a trawl on China's polar icebreaker Xuelong 2 in the Cosmonauts Sea. (Xinhua/Liu Shiping)

Members of China's 36th Antarctic expedition team collect conductivity, temperature and depth (CTD) data on China's polar icebreaker Xuelong 2 in the Cosmonauts Sea, Dec. 16, 2019. (Xinhua/Liu Shiping)

Members of China's 36th Antarctic expedition team retrieve a moving vessel profiler on China's polar icebreaker Xuelong 2 in the Cosmonauts Sea, Jan. 7, 2020. (Xinhua/Liu Shiping)

Members of China's 36th Antarctic expedition team collect buoys in the Cosmonauts Sea, Dec. 3, 2019. (Xinhua/Liu Shiping)

Aerial photo taken on Jan. 6, 2020 shows members of China's 36th Antarctic expedition team retrieving a trawl on China's polar icebreaker Xuelong 2 in the Cosmonauts Sea. (Xinhua/Liu Shiping)